<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
  </head>
  <body>
    <script>
      const arr = [
        {
          name: '张三',
          salary: 10000, // 10000*0.3
        },
        {
          name: '张四',
          salary: 15000, // 15000*0.3
        },
        {
          name: '张五',
          salary: 20000, // 20000*0.3
        },
      ]
      // 计算每个人涨薪30%之后，公司需要多支出多少成本
      const money = arr.reduce(function (prev, cur) {
        return cur.salary * 0.3 + prev
      }, 0)
      //   const money = arr.reduce((prev, cur) => cur.salary * 0.3 + prev, 0)
      console.log(money)
    </script>
  </body>
</html>
